#define  _CRT_SECURE_NO_WARNINGS 1


#include <stdio.h>
#include <string.h>

size_t my_strlen(char* s)
{
	int count = 0;
	while (*s != '\0')
	{
		s++;
		coumt++;
	}
	return count;
}

int main()
{
	int len = my_strlen("abc");
	printf("%d", len);
	return 0;
}